Assuming you have sleep, I found it easier to learn theory and read things than code. Coding requires longer uninterrupted time, which was hard to get. Learning from articles not so much - you can do it on playground while they play, you can read paragraph or think about problem while you watch them at home. Writing text turned out to be similar - it is easily possible with interruptions.

I guess the trick is not to fall down into a trap of thinking that kids needs you super active all the time. They don't, they are fully competent to play without you, for short times at first only and they will break your focus every few minutes or so. Give them your attention, but simply dont give up on reading/writing/etc and you will find the balance.